Use the normal approximation to find the indicated probability. the sample size is n, the population proportion of successes is p, and x is the number of successes in the sample. n = 78, p = 0.75: p(x < 68) a. 0.9890 b. 0.9920 c. 0.0094 d. 0.9906

You are to receive five gold coins from your great uncle as an incentive to study hard. the coins were originally purchased in 1982. your great uncle will deliver the coins the week after finals (assuming your grades are "acceptable"). the amount your great uncle paid for the coins is a(n): indirect cost.overhead cost.opportunity cost.sunk cost.